'QCloseEvent' class QCloseEvent; ^ ../../QtPass-1.2.2/src/usersdialog.cpp:138:16: error: member access into incomplete type 'QKeyEvent' switch (event->key()) { ^ /usr/local/include/qt5/QtWidgets/qwidget.h:68:7: note: forward declaration of 'QKeyEvent' class QKeyEvent; ^ 2 errors...